Is there any danger in leaving a class D amp on unattended for ten days?

We have a much longer memory of what we enjoyed and what we didn’t. Interesting article but tangential to selecting audio components 

Regarding the original question, a point which the post by Itsjustme alluded to but which has otherwise not been mentioned in the discussion is the possibility that failure of a part in the amp could conceivably result in effects such as very loud oscillations, or large DC voltages in the amp's output, or some other such possibility that can destroy the speaker it is connected to if not caught promptly. Especially in a case like this given that the 5 amp mains fuse of the amp in question (Red Dragon M500 monoblocks) will not blow unless the amp is drawing upwards of 600 watts of AC, while the amp is capable of putting hundreds of watts into the speaker without that happening.

And I certainly would not count on the designer (a)having foreseen every conceivable failure mode that might damage a speaker, and (b)having addressed all such possibilities in the design.

Finally, the fact that the amps are fairly new adds to those concerns, as failure of an electronic component typically has the greatest likelihood of occurring when the component is either very new or very old.

On another note, a happy and healthy 2018 to all!

Regards,
-- Al
   

The manufacturer of my class A single ended mono block power amps (Valvet) states the following: "It takes 20 to 30 minutes of warm up time for optimum sound quality. It is recommended NOT to switch off during short pauses. Leaving the E1 amps powered on all the time is o.k. from a technical standpoint but not clever with regard to heat and energy consumption." That stated, mine are turned on when I get home from work and turned off when I go to bed, every day except on week ends when they are on from morning to night. They do sound better after a couple hours "on" time.  

"Apart from the two disadvantages I already mentioned (fire risk and harm to the environment) there is of course another one: heat is the enemy of electronics. Leave your gear on and you will significantly reduce the life span of critical components. "

Not true. I design a lot of this gear, and the turn-on/turn off shock is the most likely time to see a failure -- or when its induced by, say, lightning.  Any well designed equipment is designed to work well below its thermal, voltage and current maximums.  The major effect i see  over long periods ( and remember, i see significant numbers in aggregate) is the deterioration of electrolytic capacitors. This *may* be accelerated byt he very modest temperatures we're talking about, but its mostly just the drying effect of age.

The constant heat also has a beneficial effect: it keeps things dry and free of mold.  I've seen more failures due to moisture and mold then heat.  Of course that's not dramatic since the hear related failures i have seen is, roughly, well, zero.

I turn stuff off to save money and the environment, and since a storm and a turn on/off thump might be unpleasant to speakers. But not due to the fact that they might be at 40-45degC.  Yea, the heats sinks on a class AB amp might get hotter, but the only thing attached to them are transistors rated to 185C.

My 3116 chip amp hasn't been off since I set the system up, but it's probably more prudent to turn everything off if you're going to be away.